TREX (transcription export) is responsible for:
A. splicing of mRNA.
B. transport of mRNA.
C. editing of mRNA.
D. degradation of mRNA.
A, B
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Of the following bacterial species, which is associated with a serious diarrheal illness with high mortality rates among some populations?
a. E. coli b. Shigella spp. c. Salmonella spp. d. Vibrio spp.
Digestion is ________.
A. Only chemical B. Only mechanical C. Both mechanical and chemical D. Neither mechanical nor chemical
What aspect of a population is critical in determining
a species in Ernst Mayer’s “biological species concept”? a. similar physical appearance b. similar patterns of behavior c. capability to interbreed d. common habitat e. similar nutritional requirements
Which organisms would most likely be present on the bottom or closest to the attachment surface of a complex microbial biofilm?
A. Facultative chemoorganotrophs B. Anaerobic sulfate-reducing bacteria C. Eukaryotic protists D. Cyanobacteria